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Authorities and Requirements


NFPA 70 Articles

The NEC is divided into chapters based on specific areas of application, and then further divided into articles. A number of articles contain requirementsAny contractor, whether specifically a fire alarm contractor or a contractor for another trade, should have a copy of the latest edition of NFPA 70 if they plan work on fire alarm systems. Many mistakes are made on fire alarm systems because in some fire alarm-specific areas, the electrical requirements are different than those in an area like industrial wiring. that will impact a fire alarm system installation. However, Article 760, Fire Alarm Systems, is the article that specifically contains the requirements for fire alarm systems. Other articles that significantly impact fire alarm systems are:
Article 100 – Definitions Article 110 – Requirements for Electrical Installations Article 225This article has an impact on the circuits that connect one building to another, when the buildings are separated by open space. – Outside Branch Circuits and Feeders Article 250 – Grounding and Bonding Article 300A number of wiring types are listed in Article 760 for use in different locations in a building protected by a fire alarm system. However, Article 300 contains wiring methods that are also applicable to fire alarm systems. Article 300 discusses raceways and conduits, for example, in the Articles following 300. – Wiring Methods Article 500Article 500 is important when fire alarm systems have to be installed in areas handling flammable and combustible liquids, dusts, and other hazardous materials. – Hazardous (Classified) Locations, Classes I, II, and III, Divisions 1 and 2
Article 720 – Circuits and Equipment Operating at less than 50 Volts Article 725Many times, there will be equipment connected to the fire alarm system that is used to increase the fire safety of a building or space. An example would be the elevator recall feature. If a fire alarm system is installed in the building, the elevator recall, as well as all other systems and their circuits providing fire protection in the building, must be interfaced with the fire alarm system. These are considered to be "remote control" circuits. – Class 1, Class 2 and Class3 Remote-Control, Signaling and Power-Limited Circuits Article 800Transmission of signals to an alarm company off-premises requires the use of communication circuits. – Communication Circuits
NOTE: This is an unformatted excerpt from our online fire protection training library.

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